Hinge.



No. 805,515. PATENTED NOV. 28, 1905. G. E. ANDERSON.

HINGE.

APPLICATION FILED NOV. 6,1903.

W/ TNESSES. A9 IN'V EN TOR.

A TTORNE Y5.

UNITED STATES PATENT OFFICE.

GEORGE E. ANDERSON, OF MILWAUKEE, WISCONSIN, ASSIGNOR TO MARY ANDERSON,OF MILWAUKEE, WISCONSIN.

HINGE.

Specification of Letters Patent.

Patented Nov. 28, 1905.

1'0 (1 whom it may concern:

purposes; and it pertains more especially, first,

to the construction of the metallic roller-cushion or cylindrical stopby which the movement of the seat upon its pivotal supports is stoppedwhen moved to its limit in either direction without shock or noise;second, to the means employed for taking up wear between the contiguousbearing-surfaces of the hinge; third,

' to the device for retaining the bearing-surfaces of theseat-supporting brackets or arms in contact with the metallic cushion,whereby such parts are caused to move together and the noise otherwiseincident to raising and lowering the seat is avoided, and, fourth, tothe general construction and arrangement of the parts by which a singlebolt of ordinary con struction for each hinge serves to hold the severalparts of the hinge in place, to take up the wear of the pivotal bearingsof the hinge, to hold the bearing-surfaces of the seat-supporting armsfirmly against the roller-cushion, and to retain all thebearing-surfaces of the hinge in their proper relative position to eachother.

My invention is further explained by ref-.

erence to the accompanying drawings, in which Figure 1 is a view of theinner side of my improved hinge, showing a portion of a seatsupportingbracket and a portion of the stationary seat-supporting arm; Fig. 2 is asimilar view with the clampingfplate of the hinge removed. Fig. 3represents a vertical section drawn on line :0 :20 of Fig. 1. Fig. 4 isa view of the inside face of the clamping-plate, showing thespring-plate. Fig. 5 is a view of a modified form of clamping-plate.Fig. 6 is a cross-sectional view of the same.

Like parts are identified by the same reference-letters throughout theseveral views.

A represents the seat-supporting arm of one of the end frames of thedesk or chair, which end frames are supported from the floor, to

which they are usually secured. It will be understood thatreversely-arranged duplicates of the parts shown are required at bothends of the desk or chair.

B is the seat-supporting bracket, which is pivotally supported from thearm A. The arm A is provided with an integrally-formed bearing-cone C,which projects into a corresponding conical socket in the hub b of thebracket B. The arm A is provided with a segmental shoulder-flange D, therespective ends of which are adapted to engage shoulders at (Z cl on thebracket B and limit the oscillatory movement of the bracket upon thebearing-cone O. A resilient cushion-cylinder E is interposed bet-weenthe shoulder-flange D and a bearingface 6 at the lower edge of thebracket B, the object of this cushion being toprevent contact or torelieve the shock which would otherwise result from the contact ofshoulders (Z with the flange D when the seat is oscillated from oneposition of adjustment to another.

The bearingface 6 is formed with two slightly-concave recesses for thereception of the cylinder E in the two positions of seat adjustment andis also formed with an intermediate convex portion, which is adapted toincrease the pressure upon the cylinder E when the seat is beingadjusted from one position to the other, whereby the cylinder E tends tohold the seat in either its raised or lowered position and offers amoderate resistance to its movement from one position to the other.

The extremities of the bearing-face e and the extremities of theshoulder-flange D converge, so that when the cylinder E is near theseextremities the pressure thereon is greatly increased. It is obviousthat when the seat-bracket B is swung the cylinder E will be caused toroll on the flange D, and the construction is such that the cylinder Ewill reach a point near the extremities, where it will bind sufiicientlyto check the movement of the seat and relieve the shock of contactbetween the shoulder d (or (Z) and the corresponding end of theshoulder-flange D. The cylinder E is preferably formed of a sleeve ofsteel or other resilient metal split or slitted along a spiral line, asshown at f, the object of the spiral trend of the slit being to preventthe edges from catching.

The bracket B and arm A are held in position by a clamping-plate G andpivot-bolt H.

The upper portion of the clamping-plate is l inder is sufficient toinsure its rolling moveprovided with a pin I, which enters a socket inarm A, and the lower portion of the clampingplate is provided with\I-shaped projections J, which enter counterpart recesses in theshoulder-flange D. These interacting projections prevent theclamping-plate from rotating. A flexible plate K is adjusted to theclamping-plate G, the same extending underneath the web-bar g, with itsends resting upon the inwardly-projecting flanges 7t 7s. The pivot-boltH passes through the plate K, and the web-bar g is apertured to permitthe nut it to bear directly upon the surface of plate K and press thesame against the huh I) with the degree of pressure required to keep thebracket from wabbling. The nut fits the aperture in the bar g, whichprevents the nut from turning, the pivot-bolt being screwed into the nutfrom the other side. The bolt may be adjusted from time to time to takeup the wear, as the plate K will yield inwardly under the pressure ofthe nut.

L is a ring adjusted to the arm A at the base of the cone G andfurnishing an end bearing'for the hub 5.

Referring to Figs. 5 and 6, it will be observed that the web-bar g isomitted and a circular disk K substituted for the plate K. The disk isprovided with a projection at M to prevent the nut from turning. As thenut is drawn inwardly by the pivot-bolt the disk is dished or sprunginwardly into contact with the hub. The plate K (or disk K) ispreferably formed of resilient material, so that a slight loosening ofthe pivot-bolt will not loosen the clamping-plate.

It will be observed that the socket in the hub Z) is somewhat largerthan the cone U, and the cushion-cylinder E is of sufficient size tosupport the bracket B, with the hub Z) bearing resiliently against theunder side of the cone. The reactionary pressure upon the cylment on theshoulder-flange D.

It will of course be understood that sufiicient space is left betweenthe opposing surfaces of the stationary parts of the hinge to permit ofthe required adjustment of said conical bearing-block and its inclosingbearings to each other from time to time as such contiguous moving partsbecome worn.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is v 1. In a device of the described class,the combination of pivotally-connected members; a segmental recessbetween said members radial to the pivotal connection; and a resilientcushion in said recess in direct contact with the opposing surfaces ofthe members, said surfaces being formed to converge at the ends of theline of.roller travel, together with a clamping device rigidly securedto one of the members, and having a resilient member bearing against theother member axially to the pivotal connection.

2. In a device of the described class, the combination of a supportingstationary member; a stationary clamping member rigidly bound to thestationary member; an'oscillatory member pivotally secured between thesupporting member and the clamping member; a resilient member connectedwith the stationary member, a pivot-bolt arranged to draw said resilientmember against the oscillatory member and a resilient roller locatedbetween said members in yielding contact with the same.

In testimony whereof I aflix my signature in the presence of twowitnesses.

GEORGE E. ANDERSON.

Witnesses:

LEVERETT 0. WHEELER, N. Z. TAUGHER.

